Carbon manifold form



Feb. 13, 1940.

e. F. BRISENDINE 2,190,253

CARBON MANIFOLD FORM Filed Nov. 16, 1936 3nnentor following the curves of typewriter platens a manifold form of the general character out- Patented Feb. 13, 1940 CARBON MANIFOLD FORM G'uy F. Brisendine, Kansas City, Mo., assignor to The Schooley Printing and Stationery Company, Kansas City, Mo., a corporation of Missouri Application November 16, 1936, Serial No. 111,026

1 Claim. (01. 282-8 This invention relates to manifold forms and has for its prime object to produce a manifold form of such type that a plurality of sheets are reliably held in collated relation for quick and easy feeding around the platen of a typewriter or onto a flat bed machine,- "such as book-keening machines, tabulating machines, and the like.

Another object of the invention is to provide a form of this kind in which adhesive is used for scuring--theinserted carbon and duplicatesheets, such adhesive, however, being so applied that the sheets maybe bound either at their top or side edges, the quantity and the spacing of the adhesive being such that it does not interfere to any extent with the flexibility of the form in or the like.

A further object of the invention is to provide lined, in which the top and bottom sheets of the form, which may also constitute the binder, are

provided with a series of pinhole openings along the fold line, thus'making it possible for'the manifold to be torn apart at this point and leave a smooth edge on the copy or duplicate sheets as well as releasing the carbon without injury so that it may be used again, although it is also contemplated that the pinhole and adhesive method of binding sheets may be applied to the type of form commercially identified as a snapout form, where the carbon is so-called one-time carbon;

A still further object of the invention is to produce a manifold form of the general character outlined, in which the adhesive only contacts or tips the edges of the sheets or inserts, leaving the form substantially open or unobstructed down to the U-bend of the binder so that extra or auxiliary copy sheets may be inserted for collation with the bound forms.

Another object of the invention is to produce means or methods for assembling manifold forms of V the general character mentioned which involves compressing the assembled forms at the time the adhesive is being applied to the perforated fold line, so that the adhesive shall not penetrate between the inserts, but will be confined to tipping or edge contact, since if the adhesive is permitted to flow onto the surfaces of the inserts it will be found that auxiliary or additional loose inserts cannot be collated with the bound sheets, because the adhesive will precompression of the assembled form has the additional function of providing 'a pocket or space to,receive the adhesive, as will hereinafter more particularly appear. I

With the general objects named in view and others as will hereinafter appear, the invention consists in certain novel and useful features of construction and organization of parts as hereinafter described and claimed; {and in order that it may be fully understood, reference is to be had tothe accompanying drawing in which the thickness of the paper, carbon sheets, and the proportions of the various features ofthe invention are greatly exaggerated because of the difficulty of illustrating them in exact and actual size. In the drawing:

Figure 1 is a fragmental perspective view of a snap-out form embodying the invention.

Figure 2 is a side elevation of the U-binder of L saddle-back type, and inserts in assembled relation prior to compression.

Figure 3 is a side elevation of the form as it appears under compression and with the adhesive applied to secure the inserts.

Figure 4 is a side elevation of a completed form.

Figure 5 is a fragmental section on an enlarged scale taken through the binding edge of a completed form.

Figure 6 isa fragmental perspective view of a snap-out original, the U-binder being of that type known as a semi-U as distinguished from the full U-binder of Figure 1, and illustrated as containing a single carbon insert;

Figure 7 is a view of the binder shown in Figure 6 as it appears in use, that is hooked over the edge of a copy sheet. I

Figure 8 is a face view of an assembly secured together alongthe side edge and illustrates the form as it may be applied to machine book-keeping on ledger sheet inserts, the original and first carbon being turned back in the lower right hand corner, and certain sheets being broken away in In the said drawing, where like reference char- I acters identify corresponding parts in all of I the figures, I and 2 respectively indicate interleaved carbon and duplicate copy sheets, hereinafter jointlyreferred to as inserts, the duplicate copy sheets having any desired horizontal and vertical ruling for collation with the companion copies and .the original. The binder comprises a sheet bent to U-form, and provided along the fold line with a series of small perforations 3, as hereinafter particularly characterized, the type of perforation being commercially known as a pinhole perforation, such as produced by various paper-working machines now in common use. The U-binder may be in the form of back and front sheets 4 and 5, as shown in Figure l, or one or both sheets or legs of the U-binder may be short, as shown at 6 and I in Figure 6. In certain applications of the invention, the row of perforations 3 not only has the function of passing adhesive as will hereinafter appear, but. has the additional function of constituting a tear line for the severance of the back and front sheets as separate copies, particularly where the carbon may be used over again, or the back and front sheets of the binder may be severable along the line of spaced cuts I when-the form is commercially known as a snap-out form.

The openings 3 must be of very small diameter, the limit to the maximum diameter being such that when the inserts are placed in position and pressure is applied to compress the manifold form, the material of the binder at its U-fold is slightly bridged or bowed outwardly from the vertical edges of the inserts as shown respectiveiy in Figures 2 and 3. Figure 2 shows the form assembly before compression and Figure 3, while compressed, both. figures being greatly enlarged and exaggerated. Of course the minimum diameter of the pin-hole openings may be in proportion to the number of inserts to be secured in position and the capacity of the adhesive used. I have found that the adhesive at the time of application should have a viscosity of from 10 to 4121 seconds as measured by a Saybolt furol viscosimeter, at the temperature at which the adhesive is used, as otherwise it will not penetrate and. fill the spaces between the imperforate portions of the binder and the adjacent edges of the inserts, or will have insuflicient adhesive power or strength. It is essential that the inserts shall be secured only by adhesion of their edges, in other words, the inserts shall be tipped to the imperforate portions of the binder, because if the openings in the binder are sufliciently large to receive adhesive of the necessary holding strength by forming a film across the openings, it will be found that such adhesive will flake or check in use, particles will become loose and fall, leading to interference with the proper operation or the jambing of the mechanism of the business machines in which the forms are employed, or in the building up of high points on platens and guides which interfere with printing operations. It will also be noted that the compression of the form adjacent the binding edge will prevent the adhesive from creeping between the leaves of the inserts. This creeping as above noted, makes it impossible to collate duplicate auxiliary or loose separate or additional copy sheets. v

As a final step in the making of the manifold forms, all surplus adhesive is removed from the exposed surfaces vof the form, because ofthe tendency of same to flake and check oil in use. One convenient method of removing the exposed adhesive is to apply a solvent for the adhesive to the edge of the binder, care being taken that I .a short leg 1.

aromas it is not so freely applied, not permitted to rein Figures 6 and 'z, a semi-U binder is illustrated, the long leg or original data sheet I and Secured in the U-fold of the binder through the pin-hole perforations l, is a carbon sheet 10. This type of construction may be used for letter-heads, for example, or for extra duplicates. To collate such assembly with another form or with a copy sheet II, the form is merely hooked over the copy sheet as illustrated.

This construction may be called an oversert inasmuch as the semi-U binder is hooked over another sheet or binder.

Figures 8 and 9 illustrate another special application of forms embodying the invention which is primarily adapted for use with machine bookkeeping ledger sheets I2. In this assembly the front sheet 13 and the back sheet H constitute a U-form folded along the side edge of the sheet rather than at the top edge. Secured by adhesive to the fold line are two carbon sheets l5 and I6. Inserted between the carbon sheets is the ledger sheet II. To insure that the ledger sheet shall be under the carbon sheet II to receive an impression, the lower right hand corners of the original sheet l3 and of the first carbon l5 are cut off, as at H, and one or more cut outs i8, edge notches in the sheet would serve the same purpose, are made in the original l3. If the ledger sheet II is inserted properly that is below second carbon instead of between the two carbon sheets.

From the above description, it will be apparcut that I have produced a manifold form and method of assembly possessing all of the advantages set forth as desirable, and while I have described and illustrated the preferred embodiments of the invention, it is to be understood that I reserve the right to all changes within the spirit of the invention and without the ambit of 

